Intelligence levels Intellect 4 Intelligence tests 3 Learning ability 2 Social conditions 2 Students 2 Affirmative action programs 1 Cognition 1 Difference (Psychology) 1 Education, Secondary - Psychological aspects 1 Equality 1 Individual differences 1 Individuality 1 Intelligence tests-History 1 Liberalism 1 Nature and nurture 1 Psychology, Pathological 1 Sex differences (Psychology) 1 United States 1